
- Complete Contamination Removal
- Extended Equipment Lifespan
- Regulatory Compliance Support
- Prevents Costly Downtime

Golden’s Trusted Partner for Fuel Storage Tank Maintenance
Fleet Core brings owner-operated expertise to every tank cleaning project throughout Golden and the Front Range. We’ve seen what happens when water seeps into diesel storage. That microbial soup doesn’t just smell bad, it wrecks injectors and gums up filters faster than you’d think. Our team understands altitude effects on fuel storage, temperature swings between Golden’s winters and summers, and how these factors accelerate contamination in stored petroleum.
We don’t just pump out your tank and call it done. Our process involves systematic inspection, complete residue removal, and detailed documentation that gives you peace of mind. Whether you’re managing backup generator fuel for a healthcare facility off Washington Avenue or storing diesel for construction equipment near the Coors campus, we’ve handled tanks of every size and configuration. That’s the difference between a vendor who shows up with a vacuum truck and a partner who actually knows fuel chemistry.
Why Choose Us
Fuel Experts That Detect, Fix and Prevent Fuel Contamination

Fleet Core has cleaned fuel storage tanks throughout Golden for over a decade, from 500-gallon farm tanks to commercial installations supporting critical infrastructure. We’ve seen every type of contamination problem Colorado conditions can create, and we know how to prevent them from coming back.
Prevents Equipment Damage
- Removes abrasive particles that accelerate wear on fuel pumps and injectors
- Eliminates water that causes rust formation inside tanks and fuel systems
- Clears biological growth before it creates acidic byproducts that corrode metal
Extends Fuel Storage Life
- Stops contamination cycles that progressively degrade fuel quality over time
- Reduces need for expensive fuel disposal and replacement
- Maintains fuel chemistry specifications for reliable combustion
Maintains Operational Continuity
- Ensures backup generators start when power fails during winter storms
- Keeps construction equipment running without filter-clogging interruptions
- Supports fleet operations with consistent fuel quality across all vehicles
Ensures Environmental Compliance
- Documents tank condition for regulatory inspection requirements
- Prevents leaks from corrosion-damaged tank walls
- Manages waste petroleum products according to Colorado environmental standards
Our Service Offering
Fleet Core Preventive Maintenance Services
We take a comprehensive approach to tank maintenance, leaving no detail overlooked:

Fuel Tank Inspections & Diagnostics
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Fuel Tank Inspections & Diagnostics
Evaluate sediment levels, tank structure, and surface seals to detect risks early.
Advanced water-testing paste locates moisture contamination before it affects performance.

Water, Sludge & Sediment Removal
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Water, Sludge & Sediment Removal
Safely extract contaminants and prevent corrosion and microbial growth for clean, reliable fuel flow.

Fuel Stabilization, Restoration & Filtering
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Fuel Stabilization, Restoration & Filtering
Add stabilizers to maintain fuel usability in long-term storage, preventing oxidation and degradation.

Detailed Compliance Reporting
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Detailed Compliance Reporting
Receive full documentation confirming your tanks meet regulatory and environmental requirements.
Why Regular Maintenance Matters
The Risks of Neglect
Leaving tanks unchecked invites risks no operation can afford:
- Contaminated Fuel: water and sludge lead to clogged filters, microbial growth, and fuel inefficiency.
- Corrosion Hazards: tank rust weakens structural integrity and increases the risk of leaks.
- Regulatory Trouble: outdated or degraded tanks can fail inspections and incur financial penalties.
Fleet Core tackles these risks head-on, so you can focus on running your business — not worrying about your fuel system.


How Often Should Tanks Be Maintained?
Stay proactive with a schedule designed for your tank type:
- High-Use Tanks (Generators and Fleet Systems): maintenance annually ensures reliability during critical times.
- Long-Term Storage Tanks: every 2–3 years, depending on environmental conditions, prevents sediment buildup and fuel degradation.
Speak with Fleet Core to create a maintenance plan customized to your operations.
Complete Fuel System Management for Golden, CO Businesses
Fuel Delivery
Direct Supply of Premium Quality Diesel Delivered When & Where You Need It
Our fuel delivery service brings diesel, gasoline, and DEF directly to your Golden location on your schedule, whether that’s routine fill-ups or emergency response. No broker markups, no supply chain delays. Just reliable fuel from a local supplier who answers the phone at 2 AM when your generator runs low during a storm.


Diesel Fuel Testing
We Can Tell You Exactly What Is In Your Fuel Tank
Professional fuel testing analyzes diesel and gasoline samples for water content, microbial contamination, particulate levels, and chemical degradation. You get objective data about fuel condition before it causes injector failures, filter plugging, or system corrosion. We provide the kind of information that turns reactive maintenance into strategic planning.
Fuel Polishing
Restore Contaminated Fuel Without the Waste
Fuel polishing salvages contaminated fuel through multi-stage filtration that removes water, particulates, and microbial growth. We turn questionable diesel back into reliable power. You’re not dumping thousands of gallons and starting over; you’re recovering your investment while protecting equipment from damage.


Eco-Friendly Oil & Fuel Spill Cleanup
Fast, Effective Spill Response That Actually Works
Petro Buster petroleum cleaner tackles oil and fuel spills with biodegradable chemistry that breaks down hydrocarbons without harsh solvents or toxic residues. Whether you’re dealing with a diesel spill at a construction site near Golden Gate Canyon or hydraulic fluid contamination at a manufacturing facility, this solution handles cleanup without creating secondary environmental problems.
Oil Analysis
Catch Equipment Problems Before They Cause Equipment Failures
Oil analysis reveals wear metals, contamination, and chemical breakdown in engine oil and hydraulic fluids, giving you early warning of bearing wear, coolant leaks, or fuel dilution. Running regular oil analysis on your construction equipment or fleet vehicles means you’re replacing parts on your schedule, not scrambling after something breaks down on a job site.

Who We Serve
Golden Industries That Can’t Afford Fuel System Failures
Fuel storage tank cleaning in Golden supports operations where reliable power and equipment uptime directly impact your bottom line. From healthcare facilities requiring generator readiness to construction companies managing job site equipment, contaminated fuel creates problems nobody has time to deal with. From premature filter changes to injector replacements and unexpected downtime that cascades through project schedules, a lot can go wrong when you have a dirty fuel storage tank.

Facilities Management
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Facilities Management
Keep Power Online in Critical Moments
Backup generators cannot afford compromised fuel. Fleet Core ensures your emergency systems are always ready, protecting against failures during power outages or generator tests.

Environmental Compliance Management
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Environmental Compliance Management
Achieve Total Regulatory Compliance
Avoid costly penalties with tank cleaning services designed to meet eco-standards. Our process ensures environmentally responsible waste handling, giving you full confidence in your compliance.

Fleet Management
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Fleet Management
Protect Uptime for Fleets
Contaminated fuel leads to downtime and disrupted schedules. Fleet Core keeps your fuel systems clean, so your vehicles stay on the road and revenue stays steady.

Construction Site Management
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Construction Site Management
Prevent Project Delays
Dirty tanks damage equipment and derail timelines. Fleet Core ensures your heavy machinery operates reliably under demanding conditions.
Testimonials
Our Commitment To Excellence
Fleet Core is more than just a fuel and fluid provider — we are your comprehensive ENERGY PARTNER supporting operational reliability, productivity, and sustainability.
“Great company and great service!! Employees are well trained and very professional!!”
“Fleet Core offers excellent customer service. They complete the commitments they make and take care of their clients.”
“Great Diesel and Service. Extremely low temps and Core Power didn’t let me down. I would recommend Fleet Core and Core Power diesel to anyone in the Denver area.”
“Quick and efficient on-site fuel delivery.”